Should I say yes or no?

I've been invited to be a vendor at an art in the garden 'thing' near DesMoines and I'm torn about it. On one hand it would be fun I think and I could possibly sell a few things. On the other hand, I have no one to help me set up and how would I make enough items to bring? If I do it I want to avoid feeling stressed over it as I don't HAVE to do it. It is just for fun and maybe it would help my business or at least get Etsy's name out there a little more. My Meg would be there with me and help as much as she can. I could meet some new people. Ahhhh!!! Was awake at 3am thinking all this over!